Interest-calculating machine.



(I. J. SMITH.

(NTEREST CALCULATING MACHINE. APPLICATION FILED FEB- 8.1913- RENEWED APR. 29, 1916- 1,13 ,140, Patented June 6,1916.

4 SHEETS-SHEET I.

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C. J. SMlTH.

INTEREST CALCULATlNG MACHINE. APPLICATION FILED FEB. 8, 1913. RENEWED APR. 29. 1916.

Patented J 11110 6, 1916.

4 SHEETS-'SHEET 2.

w vtwwow C. J. SMITH.

INTEREST CALCULATING MACHINE. APPLICATION FILED FEB. s. 1913. RENEWED APR. 29. 1916.

1 1 86, 1 40. Patented June 6, 1916.

4 S HEETSSHEET '3. ,1,

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1 DAY C. J. SMITH1 INTEREST CALCULATING MACHINE.

2 DAYS 3 DAYS APPLICATION FILED FEB. 8, 1913. RENEWED APR. 29, I916.

PatentvdJuno 6, 1910.-

4 SHEETS-SHEET 4- 4 AYS Witmaoow MO, I

cnnsrnn. J. SMITH, or mmns'rown, new YORK.

INTEREST-CALCULATING MACHINE.

Specification of Letters Patent.

Patented June 6, 1916.

Application filed February 8, 1913, Seria1 No. 747,102. Renewed April 29, 1916. Serial No. 94,517.

To all whom it may concern: I

Be it known that I, CHESTER J. SMITH, a citizen of the United States of America, and resident of Jamestown, in .the county of Chautauqua and State of New York, have invented certain new and useful Improvements in Interest-Calculating Machines, of

which the following is a specification.

This invention relates to certain new and useful improvements in calculating ma chines and while the present invention is designed primarily for calculation of interest, the main features thereof are not necessarily restricted to mechanism for this specific purpose.

The present invention has for its objects among other-s to provide a simplified construction, embodying a minimum number of parts and those capable of manufacture and assemblage at small cost so as to reduce the cost of manufacture to the lowest possible figure. I construct the case portion with sides, ends and top of one single integral piece stamped or otherwise shaped to form, and make the bottom removable and with a flange or flanges for supporting the frame carrying the rollers, etc. I so mount the rate cards that while they-are practically stationary, they are free for movement to a certain extent in order that they move or float to compensate for the increasing diameter of the roller as the sheet is wound thereupon.

I aim further atimprovements in. the details of construction as well as such other ends as are generally sought in devices of this character.

The essential features of the invention as now to be described, while, in the present instance, shown as embodied in a two-cylinder machine, are equally applicable to a machine in which four or more cylinders are employed, and it is to be understood that the invention, therefore, in the present instance is not to be restricted to a device of the two-cylinder type.

'Other objects and advantages of the invention will hereinafter appear and the novel features thereof will be particularly pointed out in the appended claims.

The invention, in its preferred form, is clearly illustrated in the accompanying drawings, which, with the numerals of reference marked thereon, form a part of this specification, and in which- Figure l is a perspective View of my improved device of the two-cylinder type. Fig. 2 is a top plan thereof. Fig. 3 is a view of one-of the rate cards removed. Fig. 4 is a perspective detail showing a portion of one of the side plates of the supporting-unit with a rate card attached. Fig. 5 is a vertical longitudinal section, as on the line 5-5 of Fig. 2. Fig. 6 is a vertical transverse section, as on the line 6-6 of Fig. 2.

Fig. 7 is alongitudinal section on the line 77 of Fig. 1, the figure being broken. Fig. 8 is an end view of the mechanism-unit removed, looking at the gear-end. Fig. 9 is a perspective view of the bottom removed. Fig. 10 is a side elevation of one of the side plates of the mechanism-unit removed. Fig. 11 is an end view thereof. Fig. 12 is an elevation of the partition or division plate removed. Fig. 13 is a perspective detail with a portion broken away showing a flanged end plate, with the end of the partition. or division plate attached thereto. Fig. 1 1 is a perspective view of the support for the roller pintles, removed. Fig. 15 is a detail in perspective showing the end of one of the rollers. Fig. 16 is an elevation of one of the roller-actuating knobs and its gear. Fig. 17

is an end view of Fig. 16. Fig. 18 is a perspective view of one of the rollers, viewed from the end opposite that shown in Fig. 15. Fig. 19 is a bottom plan with the partition or division plate in section, showing the two adjacent rate cards connected therewith. Fig. 20 is a detail in vertical sectionthrough the parts seen in Fig. 19. Fig. 21 is an enlarged diagram showing aportion of one of the sheets employed for computing interest.

Like numerals of reference indicate like parts throughout the different views.

The floating rate card feature hereinafter described and claimed may be used in connection with inclosing cases and mechanism units of various forms, that now to be described having been found very eflicient but .given merely as an example without in any way restricting the use of the floating rate card in connection with such particu-v lar construction of casing, mechanism unit, etc.

Referring to the drawings, 1 designates the inclosing case which is preferably formed of a single piece of suitable. material, such, for instance, as thin sheet metal best adapted for the purpose, stamped or otherwise given the requisite form, in the present instance rectangular, the sides, ends and top of which are integral, the top being practically open, the surrounding flange 2 being adapted to be engaged by the glass or transparent plate 3 which forms the top closure of the device, as will be best understood upon reference to Figs. 5 and 6.

1 is the bottom formed with the surrounding vertical flanges 5 at the sides and ends andat the ends with the horizontal inwardly extending flanges 6, for a purpose whlch will hereinafter be made clear. The flanges 5 at the sides and ends'of the bottom are provided with openings 7 and when the bottom is inserted in position, as seen 1n Figs. 5 and 6, screws 8 are employed which pass through the side and end walls of the outer casing 1 near the lower edge thereof and through these openings 7 in the flanges of the bottom to secure the parts in posltion, it being understood that the mechanism-unit now to be described is first inserted within the casing 1 and into its proper position and when the bottom is affixed in position, the glass top 3 is held against the flanges 2 of the casing 1 in a manner which will be readily understood.

I will now describe the mechanism-unit and the manner in which it is constructed. It comprises two side plates, one of which vis seen in Fig. 10. It is of proper height and width to fit within the outer casing and each of these side plates is provided near its upper edge With'a short longitudinal slot 10, as shown clearly in said Fig. 10, the object of which slots will be soon described. The ends of this unit are seen at 11, each comprising a member having the rightangled flanges 12, 12, to which the ends of the side plates 9 are secured by bolts, screws or the like 13, as seen in Fig. 8, the flanges 12 being provided with suitable openings 14.- for the reception of such securing means.

The end plates 11, 11 are connected by the centrally disposed partition or division plate 15, the-ends of which are provided with the bendable extensions 16, preferably in pairs, as seen in Fig. 12, which are passed through slots 17 in the end plates and then bent in opposite directions, as seen in Figs. 7, 8 and 13, to firmly join the end plates and hold the partition or division plate in position, yet

allowing of ready separation when desired. This partition or division plate 15 is provided near its upper edge with the longitudinal slots 18, one near each end, for a purpose which will soon be made apparent.

The side plates 9 are provided at their ends with openings 19 for the passage of the fastening means 13, which openings are coincident with the openings 1%]: in the end plates.

The end plates are each provided with openings 20, as seen best in Fig. 13, for the reception of the pintles of the rollers. The front end plate seen in Fig. 13 is further provided with openings 21, for a purpose which will be hereinafter explained. The flanges 12 of this front end plate are also provided with openings 22, as seen in Fig. 13, the purpose of which will be made clear as the description proceeds.

23 is a member having its ends24 bent at right angles to its body portion and provided with openings 25, as seen best in Fig. 14, the main portion or body of said melnber being also provided with openings 26, as seen in said figure. This member 23 is secured at the front end of the mechanismunit, its flanges 24 fitting within. the flanges 12 of the front end plate 11 and secured in position by screws or bolts and nuts or the like, as seen at 27 in Fig. 8, the said screws or bolts passing through the openings 22 in the end plate 11 and the openings 25 in the flanges 24.

28 is the upper roller and 29 the lower roller of one pair, while 30 is the upper and 31 the lower roller of the other pair, as seen clearly in Fig. 6. These rollers have their pintles 32 supported in the openings 20 of the end plates, and these pintles at the front end of the machine carry small gears 33, as seen clearly in Figs. 5, 7 and 8. Interposed between and meshing with the gears 33 of each pair of rollers is a large gear 34, seen clearly in Figs. 5 and 8, the arrangement being such that when the large gear'is revolved, the upper and lower rollers are revolved in opposite directions. The large gears are each carried by a stub shaft 35 having a reduced end 36 engageable in one of the openings 21 in the'front end plate 11 and a shoulder 37 to abut against said end plate. The gear 34 has a hub 38 receivingthe stub shaft and this gear .is secured to the shaft'by a screw 39, it being noted that the hub 38 is disposed between the gear and the inner face of the member 23, as shown best in Figs. 5 and 7.

40.is an operatinghandle removably engaged with the end of the stub shaft 35, which projects through an opening in the end wall ofthe casing 1, as seen clearly .in Figs. 5 and 7, being secured in position by the screw or analogous means 41.

The rollers are each provided with a longitudinal slit 42, shown in Fig. 18, and also in Fig. 6, into which slits the ends of the sheets are designed to be engaged in a well-known way. The rollers are provided at each. end with disks 43 secured thereto in any suitable way and; provided axially with a collar or projection 44, seen best in Fig. 15, such end disk being omitted from the roller'in Fig. 18. This collar or projection serves to space the end disks from the end plates 11 of themechanism-unit, as will be clearly understood upon reference to Figs. 5 and 7, and thus prevent the end disks from contact with the end members, 9

of one of the sheets employed. This is given merely by way of example, it being understood, of course, that the figures on the sheet may be continued almost indefinitely and the same arranged for from one day to three hundred and sixty-five days, more or less. In this .view, one of the rate cards 46 is illustrated along the edge of the sheet. These rate cards are affixed in position one upon each side of each roller,.as seen clearly in Fig. 2. Each card has thereon a figure designating the rate of interest. In the present instance, I have chosen to show the same as arranged for interest at 5, 5%, 6, 6 7, and 8 per cent., but it is evident that other rates of interset may be provided for, the principle being the same. cards are fixed stationary relatively to the rollers, but in order that they may have suflicient freedom of movement so as to float or be automatically moved by the increasing diameter of the rollers as the sheet is wound thereon, or to automatically fall back to their former position as the diameter of the roller decreases as the sheet is wound in the opposite direction, I support them as follows: Each rate card has afiixed thereto a number, of which I'have found two sufficient for each card, of strips 47,

as seen in Figs. 3, 4, 19 and 20. These are secured to the under side of the rate cards in any suitable manner, as by clips, clamps or the like 48, as seen in Figs. 2, 3, 4, 19 and 20. These strips 47 have their free ends extending at an angle to the rate cards, as seen best in Figs. 19 and 20, and the said free ends of the strips 47 between the rollers are passed through the slots 18 in the partition or division plate 15, and extended in opposite directions, as seen in Figs. 19 and 20, thefree ends of the said strips 47 on the rate cards adjacent the outer sides of the device being passed through the slots 10 of the side plates 9, as seen in Fig. 4. By this means, the rate cards, while held stationary relatively to the rollers, are free to move vertically, either up or down, as the dia eter of the rollers increases or decreases, so as to lie closely against the sheets. on the rollers which is considered desirable, not only for ease of reading of the 'figures, but they also in this way tend to keep the sheets from wrinkling.

In practice, the rollers with the sheets aflixed thereto are arranged between the end plates and the pintles of the rollers engaged in the openings 20 of such plates; the div sion plateor partition 15 is placed in pos1- tion with its lugs 16 extending through the I slots 17 of the end plates and these lugs then bent in opposite directions, as seen in Fig.

These rate screws 41.

13. The side plates are then applied, the small gears are affixed to the pintles of the rollers and-the side and end plates are secured together by the securing means 13. The larger gears 34 are then placed in position and the member 23 secured between the flanges 12 of the front end plate and the rate cards placed in position, The mechanismunit is then complete. The casing is, by

preference, turned upside down, the glass top 3 being laid upon What will then be the bottom, resting upon the surrounding flange 2 of the casing. The mechanism-unit is then placed in position Within the casing. The stub shafts 35 are then passed through the openings in the front end of the casing and through the openings 26 in the member 23 and through the hubs of the large gears, the reduced ends 36 of said stub shafts being engaged in the openings 21 of the front end plate. The large gears are then secured to the stub shafts, after which the operating knobs 40 are placed upon the projecting ends of the stub shafts and secured by the The bottom 4 is then applied, the flange of the latter fitting within the side and end walls of the bottom of the easing. The end walls of the mechanism-unit rest upon the inwardly extending flanges 6 at the ends of the bottom, as seen clearly in Fig. 5. The bottom is then secured in position by the screws or analogous means 8 and the device is complete. The upper edges of the side plates and the partition or division plate 15'engage the inner face of the transparent plate 3 and the parts are all held securely in position.

The mode of operation will be apparent and hardly needs detailed description. ,The rollers are turned so as to bring the figures on the sheet at the top of the device between the rate cards, when the interest for a given amount for a specified time at a certain rate is readily determined.

In Fig. 21 the rate card and the sheet are shown for the calculation of interest at 1%, 2, 2%, 2;}, etc., per cent. It is proposed to have a series of sheets for readily calculating interest at any given per cent. for any length of time for any amount.

The capability of the rate cards to-float is deemed essential for reasons heretofore given. By the term float, I mean a condition whereby the rate cards while maintain: ing a position relatively stationary, are free for movement up or down to compensate for the increasing or decreasing diameter of the rollers.

By mechanism unit I mean the unit or that member of the device embodying the end and side plates, and the rollers and their be seen that I have devised a simple, effi-. cient, reliable interest calculating device capable of manufacture at minimum cost, and while the structural embodiments of the invention as hereinbefore disclosed are what I at the present time consider preferable, it is evident that the same is subject to changes, variations and modifications in details, proportion of parts, etc., without departing from the spirit of the invention or sacrificing any of its advantages. I, therefore, do not intend to restrict myself to the exact details hereinbefore set forth, but reserve the right to make such changes, variations and modifications as come properly within the scope of the protection prayed.

The particular construction of casing and mechanism unit is not herein claimed but forms the subject matter of a separate application.

What is claimed as new is 1. In an interest calculating device, a casing, a roller therein and a rate card for cooperation with the roller supported upon some fixed part and capable of freedom of movement automatically as the diameter of the roller increases as the sheet is wound thereimnn.

rate card and means connected to the rate card and movably connected with the fixed member to allow freedom of movement, automatically, of the rate card with relation to the roller, said means having angular free ends. 1

i. In an interest calculating device, a casing, revoluble rollers therein, a partition having a slot and floating rate cards upon opposite sides of said partition and having oppositely disposed members passing through said slot.

Signed by me at Washington, D. C., this 8th day of February, 1913.

CHESTER J. SMITH.

Witnesses JOHN Scmvnnnn,

E. Bonn. 

